package org.zhadoop.stream.cql.semanticanalyzer.parser.context;

import java.util.List;

import org.zhadoop.stream.cql.DriverContext;
import org.zhadoop.stream.cql.exception.CQLException;
import org.zhadoop.stream.cql.exception.SemanticAnalyzerException;
import org.zhadoop.stream.cql.hooks.SemanticAnalyzeHook;
import org.zhadoop.stream.cql.semanticanalyzer.SemanticAnalyzer;
import org.zhadoop.stream.cql.semanticanalyzer.parsecontextwalker.ParseContextWalker;
import org.zhadoop.stream.cql.tasks.Task;

/**
 * On 条件语法解析内容
 * @author zwd
 *
 */
public class OnConditionContext extends ParseContext{

	private ExpressionContext expression;
	
	@Override
	public String toString() {
		return expression.toString();
	}
	
	@Override
	public Task createTask(DriverContext driverContext, List<SemanticAnalyzeHook> analyzeHooks) throws CQLException {
		return null;
	}

	@Override
	public SemanticAnalyzer createAnalyzer() throws SemanticAnalyzerException {
		return null;
	}

	@Override
	protected void walkChild(ParseContextWalker walker) {
		walkExpression(walker, expression);
	}

	public ExpressionContext getExpression() {
		return expression;
	}

	public void setExpression(ExpressionContext expression) {
		this.expression = expression;
	}
	
}
